The correct valve maintenance method can not only prolong the service life of the valve, but also reduce the maintenance cost. So how to maintain the valve? Next, I'll introduce you to the 13 principles of valve maintenance.

 

1. The valve shall be stored in a dry and ventilated room and blocked at both ends of the passage.

 

2. The valve shall be inspected regularly, the dirt on it shall be removed, and anti rust oil shall be applied on its surface.

 

3. After installation and application, the valve shall be overhauled regularly to ensure its normal operation.

 

4. Check whether the valve sealing surface is worn and repair or replace it according to the situation.

 

5. Check the wear of trapezoidal thread of valve stem and valve stem nut, whether the packing is outdated and invalid, and replace it if necessary.

 

6. The sealing performance of the valve shall be tested to ensure its performance.

 

7. The valve in operation shall be intact, the bolts on the flange and support shall be complete, the threads shall be intact and there shall be no looseness.

 

8. If the hand wheel is lost, it shall be equipped in time instead of being replaced by a adjustable wrench.

 

9. The packing gland shall not be skewed or have no pre tightening clearance.

 

10. If the valve is used in a harsh environment and is vulnerable to dirt such as rain, snow, dust and sand, a protective cover shall be installed for the valve stem.

 

11. The scale on the valve shall be complete, accurate and clear, and the lead seal and cap of the valve shall be.

 

12. The insulation jacket shall be free of depression and crack. 13. For the valve in operation, avoid knocking it or supporting heavy objects.